Denitrification reaction device with non-stop backwashing structure

Abstract

The utility model discloses a kind of denitrification reaction devices with non-stop backwashing structure, including denitrification reaction pool and the tail water collection area of setting in the tail end of denitrification reaction pool, the middle part of tail water collection area is equipped with partition, partition is divided into two chambers, the bottom of each chamber is equipped with filter assembly, denitrification reaction pool is equipped with baffle between tail water collection area. The utility model has the advantages that: the utility model is divided into two chambers by setting partition in tail water collection area, and the filter assembly in the two chambers is equipped with backwashing pipe, only need to close the gate of water inlet end of chamber to be cleaned, and the external clean water pump of water inlet end of corresponding water supply pipe of chamber is started to backwash, while the denitrification reaction of another chamber to sewage is still normal, so that cleaning of filter assembly is completed without stopping, and the sewage treatment efficiency of denitrification reaction pool is ensured.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a denitrification reaction device with a non-stop backwashing structure. Background Technology

[0002] Biological denitrification reactors in modern wastewater treatment are core facilities for achieving efficient nitrogen pollution removal. Their technological foundation lies in the precise control of the two biochemical processes: nitrification and denitrification. The core principle is as follows: First, in an aerobic environment, nitrifying bacteria convert toxic ammonia nitrogen into nitrate; then, in an anoxic environment, denitrifying bacteria use organic matter as a carbon source to reduce nitrate into harmless nitrogen gas, thus completely removing nitrogen from the water. In wastewater treatment, especially in the field of biological denitrification, fixed membrane packing is the core carrier and technological cornerstone of biofilm reactors. By providing a surface for microorganisms to attach, it constructs a stable and efficient biofilm ecosystem, significantly improving treatment efficiency and operational stability. It is a key technological means for upgrading, expanding, and improving the efficiency of existing wastewater treatment plants. The effluent collection area at the tail end of the denitrification reactor is usually equipped with sludge filter components to filter out residual impurities.

[0003] However, as sludge accumulates in the tailwater collection area at the end of the denitrification reaction tank, it needs to be cleaned regularly to ensure the filtration efficiency of the filter components. Some existing filter component cleaning equipment requires the denitrification reaction unit to be shut down during the cleaning process to prevent sludge from backflowing into the denitrification reaction tank and causing pollution. However, shutdown will affect the continuity of wastewater treatment and reduce the wastewater treatment efficiency of the denitrification reaction tank. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of some existing filter component cleaning equipment, which require shutting down the denitrification reaction device during the filter component cleaning process to prevent sludge from backwashing into the denitrification reaction tank and causing pollution. However, shutdown affects the continuity of sewage treatment and reduces the sewage treatment efficiency of the denitrification reaction tank. This invention provides a denitrification reaction device with a non-stop backwashing structure.

[0005] The purpose of this utility model is achieved through the following technical solution: a denitrification reaction device with a non-stop backwashing structure, comprising a denitrification reaction tank and a tailwater collection area set at the tail end of the denitrification reaction tank. A partition plate is installed in the middle of the tailwater collection area, dividing the interior into two chambers. A filter assembly is installed at the bottom of each chamber. A baffle is installed between the denitrification reaction tank and the tailwater collection area. Two water inlet windows corresponding to the two chambers are opened at the bottom of the baffle. Two sets of gates corresponding to the two water inlet windows are installed on one side of the baffle. Backwash pipes are installed on the inner bottom walls of both chambers. The backwash pipes are located inside the filter assembly, and multiple sets of equidistant flushing holes are opened on the backwash pipes. The flushing holes are inclined at a 45-degree angle along the horizontal direction. The bottom of the backwash pipe penetrates the bottom wall of the tailwater collection area and is connected to a water supply pipe. The water inlet end of the water supply pipe away from the backwash pipe is connected to an external clean water pump.

[0006] The wastewater collection area is divided into two chambers by a partition plate, and both chambers have backwash pipes installed in their filter components. When the filter components in one chamber need to be backwashed, simply close the gate valve at the inlet of the chamber to be cleaned and start the external clean water pump at the inlet of the corresponding water supply pipe for backwashing. Meanwhile, the other chamber continues to carry out the denitrification reaction of the wastewater, thus cleaning the filter components without stopping the system and ensuring the wastewater treatment efficiency of the denitrification reaction tank. At the same time, the flushing holes on the backwash pipe are inclined at a 45-degree angle in the horizontal direction, which not only expands the flushing area of ​​the water but also flushes the accumulated sludge upwards, allowing the sludge to be quickly discharged through the wastewater drain pipe at the top of the chamber.

[0007] A further technical solution involves connecting the bottom of the tailwater collection area and the outlet of the water supply pipe to the backwash pipe via a rotary joint. A motor is installed below the tailwater collection area, with a drive gear installed at the motor's power output end. The backwash pipe is located outside the denitrification reaction tank and has a driven gear that meshes with the drive gear. The motor, through the drive gear and driven gear, can drive the backwash pipe to rotate, thereby allowing the backwash pipe and flushing holes to rotate and complete multi-angle cleaning of the filter components in the chamber, improving the cleaning efficiency and effect of the filter components.

[0008] A further technical solution involves a filtration assembly comprising, from bottom to top, a pebble support layer, a porous water collection plate, an activated carbon adsorption layer, and a stainless steel filter screen. The pebble support layer, porous water collection plate, and activated carbon adsorption layer, arranged sequentially from bottom to top, effectively intercept residual organic matter and color in the effluent. The stainless steel filter screen intercepts activated carbon particles, preventing them from being lost with the effluent. Inside the pebble support layer is a protective net corresponding to the backwash pipe, located inside the protective net. The mesh size of the protective net is smaller than the pore size of the pebbles within the pebble support layer. This protective net effectively protects the backwash pipe, allowing it some rotation space and preventing direct contact between the pebbles in the pebble support layer and the backwash pipe, thus avoiding clogging of the flushing holes and preventing the pebbles in the pebble support layer from obstructing the rotation of the backwash pipe.

[0009] A further technical solution is to install a tailwater outlet pipe and a sewage drain pipe on the upper part of each chamber in the tailwater collection area. Valves are installed on both the tailwater outlet pipe and the sewage drain pipe. Tailwater is discharged through the tailwater outlet pipe, and sewage is discharged through the sewage drain pipe to discharge the sewage during the flushing process, thus separating the tailwater and sewage.

[0010] A further technical solution is to install a backwash pipe at the top of the denitrification reaction tank, and install two sets of electric hoists on the backwash pipe. The lifting ends of the two sets of electric hoists are connected to the top of the gate. By setting the electric hoists to drive the gate to lift and lower, the gate can be opened and closed to the water inlet window, thereby controlling the water entering the chamber for tailwater treatment.

[0011] A further technical solution is that each of the two sets of water inlets is provided with a sliding groove corresponding to the gate. The two sides of the gate are slidably connected to the sliding groove. By setting the sliding groove, the process of raising and lowering the gate can be guided to ensure the stability of the gate's movement. At the same time, the sliding groove can limit the gate's position to ensure the sealing effect of the gate on the water inlet.

[0012] This invention has the following advantages: By setting a partition plate, the wastewater collection area is divided into two sets of chambers, and the filter components in both sets of chambers are equipped with backwash pipes. Simply close the gate at the inlet of the chamber to be cleaned and start the external clean water pump at the inlet of the corresponding water supply pipe for backwashing, while the other set of chambers continues to carry out the denitrification reaction of wastewater normally. Thus, the filter components can be cleaned without stopping the machine, ensuring the wastewater treatment efficiency of the denitrification reaction tank. At the same time, the flushing holes on the backwash pipe are inclined at a 45-degree angle in the horizontal direction, which can not only spread the flushing area of ​​the water, but also flush the accumulated sludge upwards, so that the sludge can be quickly discharged through the wastewater drain pipe at the top of the chamber, improving the flushing effect of the sludge. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the overall structure of this utility model; Figure 2 This is a top view schematic diagram of the tailwater collection area of ​​this utility model; Figure 3 This is a cross-sectional schematic diagram of the backwash pipe and protective net of this utility model; In the diagram, 1. Denitrification reaction tank; 2. Tailwater collection area; 3. Divider plate; 4. Baffle plate; 5. Inlet window; 6. Gate; 7. Slide chute; 8. Water supply pipe; 9. Backwash pipe; 10. Flushing hole; 11. Protective net; 12. Rotary joint; 13. Motor; 14. Drive gear; 15. Driven gear; 16. Tailwater outlet pipe; 17. Pebble support layer; 18. Porous water collection plate; 19. Activated carbon adsorption layer; 20. Stainless steel filter screen; 21. Sewage drain pipe; 22. Electric hoist. Detailed Implementation To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0016] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0017] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] like Figures 1-3 As shown, a denitrification reaction device with a non-stop backwashing structure includes a denitrification reaction tank 1 and a tailwater collection area 2 located at the tail end of the denitrification reaction tank 1. A partition plate 3 is installed in the middle of the tailwater collection area 2, dividing the interior into two chambers. A filter assembly is installed at the bottom of each chamber. A baffle plate 4 is installed between the denitrification reaction tank 1 and the tailwater collection area 2. Two water inlet windows 5 are opened at the bottom of the baffle plate 4, corresponding to the two chambers respectively. Two sets of gate plates 6 are installed on one side of the baffle plate 4, corresponding to the two water inlet windows 5 respectively. Backwash pipes 9 are installed on the inner bottom walls of both chambers. The backwash pipes 9 are located inside the filter assembly, and multiple sets of flushing holes 10 are opened on the backwash pipes 9 at equal intervals. The flushing holes 10 are inclined at a 45-degree angle along the horizontal direction. The bottom of the backwash pipe 9 penetrates the bottom wall of the tailwater collection area 2 and is connected to a water supply pipe 8. The water inlet end of the water supply pipe 8 away from the backwash pipe 9 is connected to an external clean water pump.

[0020] The tailwater collection area 2 is divided into two chambers by setting a partition plate 3. Both chambers are equipped with backwash pipes 9. When the backwash pipes 9 need to backwash the filter components in one chamber, simply close the gate 6 at the water inlet of the chamber to be cleaned and start the external clean water pump at the water inlet of the corresponding water supply pipe 8 for backwashing. Meanwhile, the other chamber continues to carry out the denitrification reaction of the wastewater, thus cleaning the filter components without stopping the machine and ensuring the wastewater treatment efficiency of the denitrification reaction tank 1. At the same time, the flushing holes 10 on the backwash pipes 9 are inclined at a 45-degree angle in the horizontal direction, which can not only spread the flushing area of ​​the water, but also flush the accumulated sludge upwards, so that the sludge can be quickly discharged through the wastewater drain pipe 21 at the top of the chamber.

[0021] The bottom of the tailwater collection area 2 and the outlet of the water supply pipe 8 are both connected to the backwash pipe 9 through a rotary joint 12. A motor 13 is installed below the tailwater collection area 2. A drive gear 14 is installed at the power output end of the motor 13. The backwash pipe 9 is located outside the denitrification reaction tank 1 and is equipped with a driven gear 15 that meshes with the drive gear 14. The motor 13 can drive the backwash pipe 9 to rotate through the drive gear 14 and the driven gear 15. Thus, the backwash pipe 9 and the flushing hole 10 can rotate to complete the multi-angle cleaning of the filter components in the chamber, thereby improving the cleaning efficiency and cleaning effect of the filter components.

[0022] The filtration assembly includes, from bottom to top, a pebble support layer 17, a porous water collection plate 18, an activated carbon adsorption layer 19, and a stainless steel filter screen 20. The pebble support layer 17, the porous water collection plate 18, and the activated carbon adsorption layer 19 arranged sequentially from bottom to top can effectively intercept residual organic matter and color in the effluent. The stainless steel filter screen 20 intercepts activated carbon particles to prevent them from being lost with the effluent. A protective net 11 corresponding to the backwash pipe 9 is installed inside the pebble support layer 17. The backwash pipe 9 is located inside the protective net 11. The mesh size of the protective net 11 is smaller than the mesh size of the pebbles in the pebble support layer 17. By setting the protective net 11, the backwash pipe 9 can be effectively protected, allowing the backwash pipe 9 a certain amount of rotation space. This prevents the pebbles in the pebble support layer 17 from directly contacting the backwash pipe 9 and clogging the flushing holes 10, and also prevents the pebbles in the pebble support layer 17 from obstructing the rotation of the backwash pipe 9.

[0023] Each chamber in the tailwater collection area 2 is equipped with a tailwater outlet pipe 16 and a sewage drain pipe 21 at the top. Valves are installed on both the tailwater outlet pipe 16 and the sewage drain pipe 21. Tailwater is discharged through the tailwater outlet pipe 16, and sewage is discharged through the sewage drain pipe 21 to discharge sewage during the flushing process, thus separating the tailwater and sewage.

[0024] A backwash pipe 9 is installed at the top of the denitrification reaction tank 1. Two sets of electric hoists 22 are installed on the backwash pipe 9. The lifting ends of the two sets of electric hoists 22 are connected to the top of the gate 6. By setting the electric hoists 22 to drive the gate 6 to lift and lower, the gate 6 can open and close the water inlet window 5, thereby controlling the water entering the chamber for tailwater treatment.

[0025] Two sets of water inlet windows 5 are respectively provided with sliding grooves 7 corresponding to gate 6 on both sides. The two sides of gate 6 are slidably connected to the sliding grooves 7. By setting the sliding grooves 7, the process of gate 6 rising and falling can be guided to ensure the stability of gate 6 movement. At the same time, the sliding grooves 7 can limit the gate 6 to ensure the sealing effect of gate 6 on water inlet window 5.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A denitrification reaction device with a non-stop backwashing structure, comprising a denitrification reaction tank (1) and a tailwater collection area (2) disposed at the tail end of the denitrification reaction tank (1), characterized in that: A partition plate (3) is installed in the middle of the tailwater collection area (2). The partition plate (3) divides the interior into two chambers. A filter assembly is installed at the bottom of each chamber. A baffle (4) is installed between the denitrification reaction tank (1) and the tailwater collection area (2). Two water inlet windows (5) are opened at the bottom of the baffle (4) respectively corresponding to the two chambers. Two sets of gates (6) are installed on one side of the baffle (4) respectively corresponding to the two water inlet windows (5). Backwash pipes (9) are installed on the inner bottom walls of the two chambers. The backwash pipes (9) are located inside the filter assembly. Multiple sets of flushing holes (10) are opened on the backwash pipes (9) at equal intervals. The flushing holes (10) are inclined at 45 degrees along the horizontal direction. The bottom of the backwash pipe (9) penetrates the bottom wall of the tailwater collection area (2) and is connected to the water supply pipe (8). The water inlet end of the water supply pipe (8) away from the backwash pipe (9) is connected to an external clean water pump.

2. The denitrification reaction device with a non-stop backwashing structure according to claim 1, characterized in that: The bottom of the tailwater collection area (2) and the outlet of the water supply pipe (8) are connected to the backwash pipe (9) through a rotary joint (12). A motor (13) is installed below the tailwater collection area (2). A drive gear (14) is installed at the power output end of the motor (13). The backwash pipe (9) is located outside the denitrification reaction tank (1) and a driven gear (15) that meshes with the drive gear (14) is installed.

3. A denitrification reaction device with a non-stop backwashing structure according to claim 2, characterized in that: The filter assembly includes, from bottom to top, a pebble support layer (17), a porous water collection plate (18), an activated carbon adsorption layer (19), and a stainless steel filter screen (20). The pebble support layer (17) is equipped with a protective net (11) corresponding to the backwash pipe (9). The backwash pipe (9) is located inside the protective net (11). The mesh size of the protective net (11) is smaller than the pebble pore size inside the pebble support layer (17).

4. A denitrification reaction device with a non-stop backwashing structure according to claim 1, characterized in that: Each chamber in the tailwater collection area (2) is equipped with a tailwater outlet pipe (16) and a sewage drain pipe (21) at the top, and valves are installed on the tailwater outlet pipe (16) and the sewage drain pipe (21).

5. A denitrification reaction device with a non-stop backwashing structure according to claim 1, characterized in that: The upper part of the denitrification reaction tank (1) is equipped with a backwash pipe (9), and two sets of electric hoists (22) are installed on the backwash pipe (9). The lifting ends of the two sets of electric hoists (22) are respectively connected to the top of the gate (6).

6. A denitrification reaction device with a non-stop backwashing structure according to claim 5, characterized in that: The two sets of water inlet windows (5) are respectively provided with sliding grooves (7) corresponding to the gate (6) on both sides, and the two sides of the gate (6) are slidably connected to the sliding grooves (7).

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